Trane SCWM Series Installation, Operation And Maintenance Manual page 55

Unit Setpoints
Table 24. Unit setpoints that can be modified in the TD7
Setpoint Name
Condenser Purge Time (on units with condenser
valves only)
Discharge Air Cooling Setpoint BAS
Discharge Air Cooling Setpoint Max BAS (reset
DAT units only)
Discharge Air Heating Setpoint BAS (Units with
Heat Only)
Discharge Air Low Temperature Cutout
Duct Static Pressure Setpoint BAS
Duct Static Pressure Safety Lockout
Dirty Air Filter DP
Occupied Offset (DAT Reset Units Only)
Occupied Standby Offset (DAT Reset Units Only)
Space Temperature Setpoint BAS (DAT Reset by
Space Temp Air Units Only)
Return Temperature Setpoint BAS (DAT Reset by
Return Temp Air Units Only)
Water Side Economizer Enable Offset (Units with
Water Side Economizer Only)
Water Side Economizer Sample Time (Units with
Water Side Economizer Only)
To modify any of the setpoints in
4. Press Reports at the bottom of the screen.
5. Press the Unit Setpoints button.
6. On the Setpoint report, locate the point in the menu.
Use the arrows to scroll through the report if needed.
7. Use the up and down arrows to change the value. Or
press inside the box and type in the desired setpoint.
8. Press Save.
PKG-SVX027A-EN
Description
The amount of time (in minutes) that the compressor will open its condenser
valve during purge mode when the unit is not operating.
Used as the cooling setpoint on fixed setpoint units and on units that reset
their discharge air temperature setpoint as the low value in the reset equation.
This value should be set to the desired temperature needed for startup.
Sets the upper limit in the Reset Equation in Cooling Mode. This value can be
adjusted to the desired maximum setpoint the discharge air should reach
during cooling mode.
Used as the heating setpoint when the unit is in heating mode. This value
should be set to the desired temperature needed for startup.
Value that triggers a diagnostic when the discharge air temperature is below
this value for 10 minutes. This value can be adjusted to the desired low air
temperature, which triggers the diagnostic.
The duct static pressure setpoint is set by the analog value named duct static
pressure setpoint BAS. This value should be set to the desired pressure
needed for startup.
Shuts down the unit if the duct static exceeds this setpoint. It should be set
to the desired pressure needed for startup.
Generates a diagnostic for a dirty air filter when the differential pressure
exceeds the setpoint.
Determines the occupied cooling and heating setpoints when the unit resets
the discharge air temperature off either return or space temperature.
Determines the occupied cooling and heating setpoints when the unit resets
the discharge air temperature off either return or space temperature and is
the occupied standby mode.
Sets the space setpoint when the unit is selected to do discharge air teset
based off the space temperature. This value is used to determine the occupied
heating and cooling temperatures which reset the discharge air temperature
setpoint.
Sets the return setpoint when the unit is selected to do discharge air reset
based off the return temperature. This value is used to determine the occupied
heating and cooling temperatures which reset the discharge air temperature
setpoint.
The temperature that the condenser entering water must be below the return
air temperature before it will enable the economizer.
Time that the controller will sample the water temperature for and compare
it against the return air temperature to determine if the economizer can be
enabled.
Table 24:
Controls
Factory Default
20 minutes
55° F
65° F
90° F
35° F
1 in(H20)
2 in(H20)
10 in(H20)
2° F
4° F
72° F
72° F
7° F
2 minutes
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